1. Which one of the following is the best heat and corrosion resistant material?
a) Metals
b) Ceramics
c) Polymers
d) Semi-conductors
Explanation: Ceramics materials generally consist of oxides, nitrides, carbides, silicates or borides of various metals. Their heat and corrosion resistance is best compared to metals and polymers.
2. Polymers are used in the chemical industry because of their ___________
a) Inert nature
b) Light weight
c) Low cost
d) Easiness in fabricability
Explanation: Polymers are used in the chemical industry because of their inert nature.
3. Select the incorrect statement from the following option.
a) Composites are optically opaque materials
b) Carbon fiber reinforced composite materials are not used in space vehicles
c) Re-cyclability of composite material is poor
d) Processing of composite material is difficult
Explanation: Carbon fiber reinforced composite materials are used in space vehicles. All the other options are correct. Composites are optically opaque materials, re-cyclability of composite material is poor and its processing is difficult.
4. Which type of material expands and contract in response to an applied electric field?
a) Advanced material
b) Smart material
c) Biomaterial
d) Nanomaterial
Explanation: Smart materials(Piezoelectric) expand and contract in response to an applied electric field(or voltage).
5. Which one of the following is non-linear material?
a) Zirconium oxide
b) Magnetite
c) Maghemite
d) Lithium niobate
Explanation: Lithium niobate is a non-linear material used for telecommunication.
6. Which of the following is not an application of nanomaterials?
a) TV and computer monitors
b) Cardiology
c) Magnetic Resonance Imaging (MRI)
d) Sunscreens and fuel cells
Explanation: Cardiology is not an application of nanomaterials. TV and computer monitors, Magnetic Resonance Imaging (MRI) and sunscreens and fuel cells are some of the applications of nanomaterials.
7. Which type of cement possesses hydraulic qualities?
a) Natural
b) Puzzolona
c) Slag
d) Portland
Explanation: Natural cement possesses hydraulic qualities. The fast-setting Rosendale natural cement mortars proved to be more efficient than the mortars based on lime and sand.
8. Select the incorrect statement from the following options.
a) Puzzolona is the oldest cement invented by Romans
b) Natural puzzolona is deposit of volcanic ash
c) Puzzolona was used in making concrete for the construction of walls and domes
d) Puzzolona is quite setting cement and posses relatively low strength
Explanation: Natural cement is quite setting cement and posses relatively low strength. All the other options are correct. Puzzolona is the oldest cement invented by Romans, used in making concrete for the construction of walls and domes.
9. Blast furnace slag is the mixture of ___________
a) Slaked lime and calcium silicate
b) Aluminium silicate and hydrated lime
c) Calcium silicate and aluminium silicate
d) Silica, alumina and calcium oxide
Explanation: Blast furnace slag is the mixture of Calcium silicate and aluminium silicate. Ground-granulated blast-furnace slag is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.
10. Portland cement is made by calcining at temperature equals to ___________
a) 30000C
b) 15000C
c) 18000C
d) 20000C
Explanation: Portland cement is made by calcining at temperature equals to 15000C. It is manufactured from chalk and clay which hardens under water and when hard resembles Portland stone in color.